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Title: | Performance of Azolla caroliniana Willd. and Salvinia auriculata Aubl. on fish farming effluent |
Other Titles: | Performance de Azolla caroliniana Willd. e Salvinia auriculata Aubl. em efluente de piscicultura |
Authors: | Toledo, Jos? Julio Penha, Jerry Magno Ferreira |
Keywords: | Animals Aquaculture Comparative Study Eutrophication Fern Growth, Development And Aging Methodology Time Water Management Animal Aquaculture Eutrophication Ferns Time Factors Water Purification Azolla Caroliniana Salvinia Auriculata |
Issue Date: | 2011 |
metadata.dc.publisher.journal: | Revista Brasileira de Biologia |
metadata.dc.relation.ispartof: | Volume 71, Número 1, Pags. 37-45 |
Abstract: | The increasing release of untreated fish farming effluents into water courses that flow to the Pantanal wetlands in Mato Grosso (Brazil) may drive this ecosystem to eutrophication. Therefore, the growth of Azolla caroliniana Willd. and Salvinia auriculata Aubl. in fish farming effluent and their effect on its quality were evaluated for 48 days in a greenhouse. The results were compared to those obtained in a nutrient rich solution (Hoagland 1/2 medium). Azolla caroliniana showed lower relative growth rate in fish farming effluent (0.020 d-1) than in Hoagland 1/2 medium (0.029 d-1). However, S. auriculata grew slightly better in fish farming effluent (0.030 d-1) than in Hoagland 1/2 medium (0.025 d-1). The species apparently contributed to reduce nitrate and phosphate concentration in Hoagland 1/2 medium. However, in fish farming effluent, only electrical conductivity and pH were reduced by plants compared to the control without plants. Thus, A. caroliniana and S. auriculata show low potential for improving effluent quality. |
metadata.dc.identifier.doi: | 10.1590/S1519-69842011000100007 |
Appears in Collections: | Artigos |
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